Concrete-mixer.



No. 849,732. PATENTED APR. 9, 1907. E. E. FLORA.

CONCRETE MIXER.

APPLICATION FILED JAN.23,1906.

2 SHEETS-SHEET 1.

No. 849,732. PATENTED APR. 9, 1907. E. E. FLORA.

CONCRETE MIXER.

APPLIOATION FILED JAN.23,1906.

Z SHEETS-SHEB1' 2.

V UNITED smi es PATENT oFFron.

ELL'SWORTH E. FLORA, or CHICAGO, ILLINOIS, Assrcnoa TO W. o. WILLIAMS, OF SOUTH BEND, INDIANA.

CONCRETE-MIXER.

Patented April 9 1907.

' 31'!) all whom it may consent.-

Be it known that I, ELLSWORTH E. FLORA, a cltizen of the United States, residing at Chicago, in the county'of Cook and State of Illinois, have invented a new and useful Improvement in Concrete-Mixers, of which the ollowing is a specification.

My invention relates to ifiiprovementin devices of the rotary type for effecting thoroughmixture in batches of granular or pulverulent material fed thereto; and it relates more particularly to a machine or device of this class adapted for mixing together the in gradients of concrete for building and other.

purposes.

My object is to provide, more especially, a concrete-mixer of the above type which shall be of comparativel sim lo and inexpensive construction an at t e same time perform the mixing of either wet or dry ingredients with great thoroughness and rap1 1ty.

Referring to the drawings, Figure 1 is a top lan view of my improved mixer; Fig.62, an e evation of the discharge side thereof; Fig. 3, a broken section taken on line 3 in Fig. 1; and Fig. 4, a section of the casing or receptacle, taken on line 4 in Fig. 3.

Secured to a base A are standards a b.

Bis a rectangular-frame provided at opposite sides with trunnions c.

C is a casing or mixing-receptacle formed with heads D E, each head being dished to present the funnel-form parts e e, terminatmg in necks f, provided with outer end flanges g. The heads are jourfnaled at the necks f in bearin s h on the frame B. The neck portion of t e head D presents a central inlet-opening i, loosely fitted with an upwardly-projecting hopper-sha ed extension it, while the neck f of the hea E surrounds an outlet-opening 7 It is very desirable in devices of this character to provide rotary mixing-receptacles without any internal mechanism or obstructions against free mixing movement of the contained concrete ingredients. Obstructions forming mixing-blades, deflectors, wallpockets, 0r shelves in the receptacle are undesirable, particularly where wet concrete ingredients are to be thoroughl mixed, because theconcrete tends to a here thereto and pack or ball and solidify in the angles, thereby interfering with the operation and I making it very difficult to clean the interior of the receptacle after a run. In the construction s tudinally-extending pockets m of involute form in cross-section, as indicated. It will be seen that the pockets are formed by the wall itself, andnot by any plates or other obstructions fastened against the wall, and that the junctions between adjacent pockets form narrow curing edges over which the material in t e rotation of the receptacle pours in contradistinction to sliding backwardly from one pocket into the next in sucsession.

G-is'a hollow power-shaft j ournaled in the to of the standard I) concentrically with the a j acent trunnion c and carrying a sprocketwheel n, connected by means of a drivechain 1) with a sprocket g on a shaft 1', journaled in the frame B in the position shown. The shaft r carries a pinion s, meshin with a large gear-wheel t, fastened'upon the ead D.

Turning of the shaft G thus causes rotation of the rece tacle C in the bearings h on the frame B. fhe hopper extension 7c, as shown, projects into the opening 'i, but is fastened rigidly to the frame B by means of brackets '22 and is thus held against rotation. The trunnion c on one side of the frame D is journaled in a bearing-opening in the top of the standerd a, while the other trunnion cis journaled in the hollow shaft or sleeve G', which in turn is journaled in the top of the standard b and carries the sprocket 'n, as stated. Pivoted at w upon the frame B is a lever 2;, provided with a notch w. A link is pivotally connected at one end to the free end of the lever 21 and at its op osite end with the flange g of the head E. if lever u is lpivotall connected at one end to the top of t e stan m. -When engaging the notch 00 the lever u forms a fixed pivot for the movement of the lever'a; thereon. Fastened to the trunnion c to extend beyond the head D is a receptacleupsetting lever or handle z.

In the rotation of the receptacle the link y vibrates the lever x on the pivot at a) and swingsthe frame B up and down to oscillate the said frame upon the bearings a t, ar 1d thus rock the receptacle at right angles to 1ts axis of rotation. Thus it will be understood that own the surrounding wall F of the receptacle C is shaped into three longiard a, and may he slid laterally into and out. of engagement with the notch w, in the lever Y ticularly intimate mixing mass in'a limited number of rotations and l the combination 2o ets self-cleaning. For example,

terial is carried upward by the deep sideof a by any fect-the desired thorou v upon the character of file mass.

5 nions c and u caused again to engage during rotation the rece evers 1m: are in enautomatically while the 1 gagement. 3

In operation the ingredients to be mixed 5 together are fed into the-receptacle C through the ho per in and opening i nearly to the level 0 the lower side of the opening Z. During the rotation of the receptacle in the direction of the arrow in Fig. 4 the mass to be I0 mixed is raised by the pockets m and poured from one ocket into another, thus causing the ingre ients to become intimately intermixed. The involute shape of the pockets is of great importance because it insures parrocking movements of the receptacle, presents no corners in which plastic material may lodge and adhere, and renders the pockas the mapocket m it is poured over into the pocket ollowing and spread out. At the same time it slidesupon the base-surface of the pocketsin 2 5 a manner to prevent any adhesion of the mixture thereto. The automatic rocking movement of the receptacle causes the concrete to pour first in the direction of one end of the receptacle and then in the direction of the go opposite end, thereby preventing any tendency to vertical stratification and insuring intimate mixture longitudinally as well as transversely throughout the receptacle. Tliiis a more thorough mixing of the ingredients of 5 the concrete is produced in alimited number of turns of the receptacle than can be effected other mixer of which I am aware.

take from twelve to fifteen rotaof Ithe receptgcle tcefmlxlng, e en m W'fien an; is done, the contents may be discharged by disengaging the levers u so and ress ing down the lever z to turn the receptac e on the trunset it to pour the mixed mass through the dlscharge-opening Z while the receptacle rotates. When all t e contents are thus discharged, the receptacle may be righted again by raising the lever z and the lever a the notch 11: of the lever w ready for another batch. In the construction shown the heads D describe the same contour as the surroundin wall of the receptacle and are formed wit It' may tions and oscillations said wall. The of the receptacle are held togethrby t ie of the contained scenes rods 1', passing longitudinally across the outer surface of the surrounding wall and fastened by means of nuts to the heads, all as indicated in the figures. The surrounding wall is preferably of sheet or plate metal, and' the heads are preferably cast. In the event use or rusts through it may be readily removed and replaced with another surrounding wall. In aconstructing machines of different lengths the same heads may be employed, which is an advantage.

What I claim as new, and desire to secure by Letters Patent, is-

that the surrounding wall becomes worn in 1. In a machine of the character described,

of a frame, a mixing-receptacle on the frame having a nonerforated surrounding wall formed with a p urality of internal pockets of curved involute shape in cross-section, a ridgeformed between the members of each pair of said pockets by their: junction and forming a pouring edge from one pocket into the other in the rotation of the receptacle, and means for rotating the receptacle on the frame.

2. In a machine of the character described, the combination of a frame, a mixing-receptacle on the frame, means for rotating the receptacle on the frame, and means on the frame- 0 crating automatically to rock the receptac e endwise during its rotation.

3. In a machine of the character described, the combination of a frame, a mixing-receptacle on the frame, means for rotating the receptacle on the frame, attachable and de; tachable means for automatically rocking the receptacle endwise during its rotation,

and means for upsetting the receptacle on theframe. I p 4. ha machine of the character set forth, the combination of a frame, a mixing-receptacle on the frame having a nonerforated surrounding wall formed with a p urality of tively, and means for rotatingthe receptacle on the frame.

- ELLSWORTH E. FLOR'Ai In presence of J, W. DYRENFORTH, J. H. LANDES. 

